DE3022873A1 - METHOD AND DEVICE FOR WINDING A CONDUCTOR COIL - Google Patents

Description

HOEGER ₁ STEIiLREGHT - ^ PARTNER

PAT "E N" Τ ANW A "LT Ε" "" 3QZ2873

UHLANDSTRASSE 14 c D 7000 STUTTGART 1

A 44 198 b Applicant: Lucas Industries Limited k - 177 Great King Street

June 18, 1980 Birmingham B19 2XF

England

Method and device for winding a conductor coil

The invention relates to a method for winding a conductor coil onto a radially protruding element of a Workpiece with several such elements and with an axis of rotation and a device for implementation of the procedure.

It is known to wind windings of a conductor wire onto a bobbin, which is part of a Workpiece with several such bobbins, which protrude radially from an axis of rotation of the workpiece. The wire or the conductor is fed via a guide, which alternates or reciprocating swiveling movements about an axis of rotation of the workpiece parallel and at a distance from this located swivel axis executes and which also parallel to the axis of rotation of the workpiece performs reciprocating linear movements. With this winding technique it is in many cases difficult or impossible to bring the conductor close to the radially inner end of the coil cores or arms, which protrude radially outward from the workpiece axis.

Starting from the prior art, the invention is based on the object of a method and a Specify device with or with the on

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the radially protruding arms of a workpiece are generated radially far inward-reaching windings can.

This task is, as far as the procedure is concerned, through solved the method according to claim 1, and what the device is concerned, by the device according to claim 4.

The decisive advantage of the method and device according to the invention is that the relative pivoting movements between the guide and the workpiece with respect to a pivot axis take place, which is formed by the workpiece axis or an axis at least substantially coinciding with it, which makes it possible bring the inner turns of the conductor coil close to the inner end of the coil body or arms, the space available between the arms of the workpiece, in particular a rotor core, in an embodiment of the invention, is used particularly optimally when the conductor coils are wound in such a way that they are conical or conical in the radial direction from the inside to the outside. enlarge pyramidal shape.

In an embodiment of the invention, it is also advantageous if the pivoting movements are compensated Radial movement is superimposed with the aim of undesired overlapping of adjacent turns to avoid in a position of turns, since it has been shown that such an overlap or overlap ultimately results in a loose bobbin

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structure that does not ensure optimal use of the available space. In particular the compensating, superimposed radial movement is controlled according to the invention in such a way that the Pivoting movement is an essentially straight line relative movement between the guide and the workpiece results.

Refinements of the invention are the subject of subclaims.

Further details and advantages of the invention are provided explained in more detail below with reference to drawings. Show it:

1 shows a schematic representation with a workpiece to be wound and with the relative position the guide to the workpiece in the prior art and when working according to the invention ;

Fig. 2 is a schematic representation of a preferred embodiment of a device for • Implementation of the method according to the invention;

FIG. 3 shows an enlarged schematic cross-sectional illustration of the device according to FIG. 2 along the line 3-3 in this figure to explain the relative movement of the workpiece and guidance in a selected level;

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4 shows a schematic illustration to explain the relationship between the one according to the invention Device provided, with · correction devices designed control for the guidance and the sequence of the relative movement between guide and workpiece; ·

5 shows a further enlarged schematic illustration to explain the effect of the correction devices;

6 shows a top view of a cam disk of the control of the device according to FIGS. 2 and

7 shows a schematic representation of the drive of the device according to FIG. 2.

In detail, Fig. 1 shows a workpiece 10, namely the core of the rotor of an electric motor, wherein the The rotor core has eight arms 11 which are arranged at equal intervals and which are radially outward protrude from an axis of rotation 12. Each of the arms 11 has a flange or a flange at its outer end Head piece 13 and must be provided with a winding 14 during manufacture of the rotor.

In known methods and devices, the wire for the windings 14 is guided by a hollow needle, which is angularly pivotable about the axis of a rod 16 which runs parallel to the axis of rotation 12. The hollow needle 15 is also straight in

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The direction of the rod 16 can be moved back and forth, so that the wire 17 in the course of successive pivoting movements and linear to-and-fro movements around an arm .11 can be wrapped around the required To produce winding 14. From Fig. 1 it is clear that in many cases the to be wound Arm 11 adjacent arms 11 and the head piece prevent the conductor or wire 17 from being up close to the ends of the inward in the radial direction Arms 11 can be wrapped. But this ultimately leads to poor use of the space available per se for the windings 14.

According to the invention, the procedure is that relative pivoting movements between the wire guide and the rotor core takes place only with respect to the axis of rotation 12 of the same. However, as shown in FIG. 1 and those indicated there Wire guides 15a and 15b is clear, with the result that the wire guide with respect to the rotor core 10 can be moved much further inward in the radial direction than in the method and device according to the state of the art. For this purpose, according to the invention, as indicated in FIG. 2, the rotor core 10 is fixed on a shaft 20 by means of clamping elements 21. The shaft 20 is in bearings stored. A drive 23 of known design can be actuated in such a way that it can pivot to and fro and axial movements of the shaft 20 can be brought about. A hollow wire guide 24 for one Conductor 25 is slidably mounted in a fixed bearing 26 so that it is with respect to the axis of rotation 12 is reciprocable in the radial direction. The drive 23 also drives

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a cam disk 27 in such a way that the cam disk 27 alternates in one and the other Direction of rotation is rotated for just under one full turn. The edge of the cam 27 is provided with a number of notches 28, the purpose of which will be explained below. A scanning lever 29 is so resiliently biased against the cam disk 27 that its radial position with respect to the The axis of rotation or the shaft 20 is dependent on the angular position of the cam disk 27.

Fig. 3 shows the path of the hollow wire guide 24 with respect to an arm 11 of the rotor core 10 with successive, Pivoting and axial movements of the rotor core 10 caused by the drive 23 the movement along the section A-B of the path is essentially due to an upward movement of the Rotor core 10 causes. The section B-D of the path is then essentially due to a pivoting movement of the rotor core 10 in a first direction. Then section D-E becomes the path traversed due to a downward movement of the rotor core 10, whereupon the section E-A of the path essentially due to a pivoting movement of the rotor core 10 in the opposite direction to the first direction Direction is traversed. Each cycle 0 of the drive 23 thus leads to a sequence of relative movements between the wire guide 24 and the rotor core 10, which ultimately result in a turn of the conductor 25 is produced on the arm 11 in question. At the same time, each cycle leads of the drive 23 to the fact that the cam disk 27 is rotated by an angle, which has the consequence

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that the scanning lever 29 the path between two adjacent Notches 28 back. Overall, the shape of the cam as shown in the drawing leads 27 to the fact that there is a radial movement of the wire guide 24, which has the consequence that the conductor 25 is helically wound onto a predetermined portion of the arm 11.

4 shows a partial development of the cam path of the cam disk 27. As mentioned above, it takes place in a cycle 0 of the drive 23, a rotation of the cam disk 27 by an angle that corresponds to the two spaces between the notches 28 corresponds. Each of the notches 28 now has two areas 28a and 28b of which each corresponds to one twelfth of a cycle 0 of the drive 23. If now the scanning lever 29 (Fig. 2) runs over one of the notches 28, then consequently the wire guide 24 is first radially inward and then moved radially outward, based on the axis of rotation 12 of the rotor core -10.

As FIG. 5 shows, the angular relative movement would between the rotor core 10 and the wire guide 24 during one sixth of a 0 cycle along the section E-A of the track cause the mouth of the hollow wire guide 24 runs through an arc 30 with respect to the axis of rotation 12. However, this could result in the When moving from E to A laid out conductor section over a previously applied turn of the Winding is deposited. This is especially true if the direction of rotation of the cam disk 27 is so different

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runs that substantially a radially inwardly directed movement of the wire guide 24 opposite the rotor core 10 results. The notches 28 are now designed so that during the angular Relative movement from E to F is a movement of the wire guide 24 directed radially inward takes place, while the movement from F to A is a radially outward movement. In order to for the resulting relative movement there is essentially the straight line 31, which both runs perpendicular to the axis of rotation 12 and to a radius of the rotor core 10. Similarly, will also modified the movement between points B and D of the path of FIG to achieve straight line movement.

6 shows a plan view of a cam disk, intended for controlling a winding process is, in which twenty-two turns are generated per layer of a winding. You can see that the distance L corresponds to the total length of the winding in the radial direction and that the ratio of The circumference of the cam for distance L depends on the diameter of the winding to be produced.

Since the angular relative movements between the rotor core 10 and the wire guide 24 in the exemplary embodiment have a constant size, take the length of bow 30 and tendon 31 (Fig. 5) with increasing radial distance from the axis of rotation of the rotor core 10. The distance between the tendon 31 and the point F on the arc 30 thus increases with increasing radial distance. The correction,

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caused by the notches 28 in the cam 27 must therefore also be increased, and it is clear from FIG. 6 that the depth of the notches 28 increases with increasing cam radius, the cam radius in turn correspondingly the increasing radial distance of the wire guide 24 from the axis 12 of the rotor core increases.

It should be noted that in a modified embodiment, the drive 23 is designed in this way it can be said that the angle of rotation of the rotor core decreases when the radial distance between the wire guide 24 and the axis of rotation 12 increases. With such an arrangement it can be achieved that the Correction brought about by the notches 28 remains essentially constant, so that the notches can be identical along the entire circumference of the cam.

For optimal use of the space available for the windings, these can be pyramid-shaped or be conical, as indicated for the winding 18 in FIG. 1. To such a Establishing winding, it is ensured that the angle of rotation of the cam disk 27 decreases when successive Position of the winding 18 can be produced.

It can be seen that the angle of rotation of the cam can be controlled in different ways, that a winding of the desired shape is built up from successive layers of conductor turns.

Fig. 7 schematically shows a construction due to

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which the drive 23 can drive the shaft 20 to reciprocating linear and pivoting movements. As FIG. 7 shows, a crank 36 and a cam disk 37 are / are on an input-side drive shaft attached. An external toothing 38 is keyed onto the shaft 20. In addition, the shaft 20 is freely rotatable supported in a lower bearing block 39, which in turn is slidable in the vertical direction is guided by guides (not shown), which are mounted on a stationary machine part are. A connecting piece 40 is used for the articulated connection of the crank 36 to the block 39, so that a rotational movement of the shaft 35 results in a reciprocating movement or up and down movement of the shaft 20 Has. A crank arm 41 with internal teeth sits on the external teeth 38 of the shaft 20 and is of a fixed bracket 42 supported. A sensing arm 43 (with a roller at its lower end) is on pivotably mounted on a pivot pin 44 and biased against the cam disk 37 by means of a spring 45. The end of the cam scanner 43 facing away from the cam disk 37 is via a connecting piece 46 articulated to the crank arm 41. The cam disk 37 has two latching areas 37a, 37b, which are different Have distances from the axis of rotation of the shaft 35 and are designed so that at their no swiveling movements of the curve sensor run over 43 and thus the shaft 20 are caused. The latching areas 37a and 37b thus ensure the movements of the rotor core 10, which correspond to the sections B-D and E-A of the path according to FIG. 3.

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Claims (7)

HOEGER ₁ STELLREICHT & PARTNER UHLANDSTRASSE 14 ο D 7000 STUTTGART 1 A 44 198 b Applicant: Lucas Industries Limited k - 177 Great King Street June 18, 1980 Birmingham B19 2XF England Claims Method for winding a conductor coil onto a radially protruding element of a workpiece several such elements and with an axis of rotation, characterized by the following process steps: one leads the leader through a guide; a first linear reciprocating relative movement is carried out between the guide and the workpiece essentially parallel to its axis of rotation; there is a reciprocating relative pivoting movement between the guide and the Workpiece essentially around its axis of rotation; the changes in the direction of movement for the pivoting movement and the first linear movement are carried out Relative movement alternating with and a second linear relative movement is essentially carried out between the guide and the workpiece radially to the axis of rotation of the same. 2. The method according to claim 1, characterized in that the second linear relative movement 030054/0699 ORIGINAL INSPECTED June 18, 1980 - 2 - performs as a reciprocating relative movement. 3. The method according to claim 1 or 2, characterized in that that you each of the pivoting movements successively one radially inward and superimposed a radially outward movement of the guide and that the size of the superimposed radial movements depending on the radial position of the guide on the axis of rotation of the workpiece, dimensioned at the beginning of the relevant pivoting movement such that When pivoting, there is an essentially straight relative movement between the guide and Workpiece results. 4. Device for winding a conductor coil onto a radially protruding element of a workpiece with several such elements and with an axis of rotation, in particular to carry out the Method according to one of claims 1 to 3, characterized in that a guide (24) for the conductor (17) is provided that drive devices (23) for bringing about a first linear reciprocating relative movement between the guide (24) and the workpiece (10) in the essentially parallel to its axis of rotation (12) and to bring about a reciprocating relative pivoting movement between the guide (24) and the workpiece (10) essentially around the latter Rotation axis (12) are provided, which are designed such that the changes in the direction of movement for the swivel movement and the first Ii- 030064/0699 k - 177 June 18, 1980 - 3 - linear relative movement alternating one after the other ^ and that deflection devices (27) for bringing about a second linear relative movement between the guide (24) and the workpiece (10) essentially radially to its axis of rotation (12) are provided. 5. The device according to claim 4, characterized in that additional devices (28) are provided, with the help of which the radial position of the guide (24) relative to the axis of rotation (12) of the workpiece (10) with each pivoting movement by a superimposed Radial movement can be changed first radially inwards and then radially outwards. 6. Apparatus according to claim 5, characterized in that that the deflection devices for bringing about the second linear relative movement one with . the guide (24) and the drive devices (23) comprise cooperating cam disk arrangement (27). 7. Apparatus according to claim 6, characterized in that that the additional devices for generating the superimposed radial movement than with the guide (24) cooperating zones (28) of a curved path of the cam disk arrangement (27) are formed are. 030064/0699 ORIGINAL INSPECTED